But when i am using some bluetooth provider like 'Bluetooth GPS' or 'Bluetooth GPS Provider' to connect my receiver with Locus, i can see GPS position, accuracy, latitude, last fix, all data under that circle with satelites, but no data on that circle about satelites. Is it normal or Locus cannot handle that data, or BT provider doesnt serve such data? I tried few providers and the same.

Enabling 'mock gps provider' i thought that just whole nmea stream is send to applications and then it can show satelites data. btw, in provider app i can see satelites circle 'map' with info about their signal strength...

It means that it is misadvantage of BT gps providers :( cause i cannot see satelites data with BT provider, just screen looks worse :) without that picture :)

So... i thought that there is no difference between internal GPS and connected through BT GPS receiver. But... when i connect BT GPS with internal locus BT connection then i have all data available... strange... what BT provider do with data not giving that to the listening application... i thought that data from internal gps, from locus bt gps and from bt provider are the same... pity that they're not :(

Simple - Locus do not parse any data from internal GPS or GPS connected with any 3rd party app - Locus just receive already parsed data and work with them. If 3rd party app do not send any data (like info about satellites), it's not a problem of Locus.

So generally, Locus do not see if data are from internal GPS or from 3rd party app. They behave exactly same inside app.

But data from BT GPS connected directly to Locus are generated from raw NMEA messages and are completely handled by Locus itself. So if required data are in NMEA messages, they should be also visible.

If in internal gps i can see satelites and you say that internal gps and gps through 3td parties app are handled the same but i cannot see satelites when with 3rd party app, then all depends on data from 3rd parties:) so, it is possible but BT provider doesnt send that data... if i understand right:)